Management of Diarrhea in Pregnant Women

Immediate Assessment and Stabilization

The American College of Obstetricians and Gynecologists recommends immediate assessment for dehydration and electrolyte abnormalities in pregnant women with diarrhea, followed by oral rehydration therapy as first-line treatment, with careful avoidance of loperamide and most antimotility agents during pregnancy 1
Assess hydration status and evaluate for fever, frank blood in stools, or signs of severe dehydration, as these require urgent medical intervention 1, 2
Obtain electrolyte panel, particularly potassium and magnesium levels, as pregnant patients are at higher risk for electrolyte depletion 1

The Centers for Disease Control and Prevention recommends reduced osmolarity oral rehydration solution (ORS) as the first-line therapy for mild to moderate dehydration in pregnant women with acute diarrhea 1
Continue ORS until clinical dehydration is corrected, then use for maintenance and to replace ongoing stool losses 1
If the patient cannot tolerate adequate oral volumes, consider nasogastric administration of ORS 1
Encourage consumption of glucose-containing drinks or electrolyte-rich soups as alternatives 2

The National Institute of Diabetes and Digestive and Kidney Diseases recommends resuming a usual diet immediately after rehydration begins, with small, light meals guided by appetite 2
Avoid fatty, heavy, spicy foods and caffeine 2
Consider avoiding lactose-containing foods if diarrhea persists beyond a few days 2

The American College of Obstetricians and Gynecologists recommends avoiding antimotility drugs like loperamide in pregnant women with diarrhea, especially if there is fever or suspected inflammatory diarrhea 1

Seek immediate medical evaluation if there is no improvement within 48 hours, development of high fever, frank blood in stools, severe vomiting, or obvious dehydration 2
If severe dehydration develops, intravenous isotonic fluids such as lactated Ringer's or normal saline are indicated 1

The Infectious Diseases Society of America recommends offering probiotics to reduce symptom severity and duration in immunocompetent pregnant patients with infectious diarrhea 1
Antiemetic agents can be considered once adequately hydrated, but are not a substitute for fluid and electrolyte therapy 1

If diarrhea persists beyond 48 hours or warning signs develop, consider stool studies for infectious pathogens and sigmoidoscopy or colonoscopy only if there is strong suspicion of colonic mass or severe persistent diarrhea 1, 3, 4

For pregnant women with known inflammatory bowel disease and a suspected flare, flexible sigmoidoscopy or colonoscopy may be performed if results will affect management, as recommended by the American Gastroenterological Association 5